<template>
  <div class='com-container'>
    <div class='com-chart' ref='stock_ref'></div>
  </div>
</template>

<script>
export default {
  name: "Stock",
  data() {
    return {
      chartInstance: null,
      allData: null,
      currentIndex: 0,
      timeId: null
    }
  },
  created() {
    this.$socket.registerCallBack('stockData', this.getData)
  },
  mounted() {
    this.initChart()
    // this.getData()
    this.$socket.send({
      action: 'getData',
      socketType: 'stockData',
      chartName: 'stock',
      value: ''
    })
    window.addEventListener('resize', this.screenAdapter)
    this.screenAdapter()
  },
  destroyed() {
    window.removeEventListener('resize', this.screenAdapter)
    clearInterval(this.timeId)
    this.$socket.unregisterCallBack("stockData")
  },
  methods: {
    initChart() {
      this.chartInstance = this.$echarts.init(this.$refs.stock_ref, 'chalk')
      const initOption = {
        title: {
          text: '▎ 库存和销量分析',
          left: 20,
          top: 20
        }
      }
      this.chartInstance.setOption(initOption)
      this.chartInstance.on('mouseover', () => {
        clearInterval(this.timeId)
      })
      this.chartInstance.on('mouseout', () => {
        this.startInterval()
      })
    },
    getData(ret) {
      // const {data: ret} = await this.$http.get('stock')
      this.allData = ret
      // console.log(this.allData)
      this.updateChart()
      this.startInterval()
    },
    updateChart() {
      const centerArr = [
        ['18%', '40%'],
        ['50%', '40%'],
        ['82%', '40%'],
        ['34%', '75%'],
        ['66%', '75%'],
      ]
      const colorArr = [
        ['#4FF778', '#0BA82C'],
        ['#E5DD45', '#E8B11C'],
        ['#E8821C', '#E55445'],
        ['#5052EE', '#AB6EE5'],
        ['#23E5E5', '#2E72BF']
      ]
      const start = this.currentIndex * 5
      const end = (this.currentIndex + 1) * 5
      const showData = this.allData.slice(start, end)
      const seriesArr = showData.map((item, index) => {
        return {
          type: 'pie',
          center: centerArr[index],
          hoverAnimation: false,
          labelLine: {show: false},
          label: {
            position: 'center',
            color: colorArr[index][0]
          },
          data: [
            {
              value: item.sales,
              name: item.name + '\n\n' + item.sales,
              itemStyle: {
                color: new this.$echarts.graphic.LinearGradient(0, 1, 0, 0, [
                  {
                    offset: 0,
                    color: colorArr[index][0]
                  },
                  {
                    offset: 1,
                    color: colorArr[index][1]
                  }
                ])
              }
            },
            {
              value: item.stock,
              itemStyle: {
                color: '#333843'
              },
            },
          ]
        }
      })
      const dataOption = {
        series: seriesArr
      }
      this.chartInstance.setOption(dataOption)
    },
    screenAdapter() {
      const titleFontSize = this.$refs.stock_ref.offsetWidth / 100 * 3.6
      const innerRadius = titleFontSize * 2.8
      const outerRadius = innerRadius * 1.125
      const adapterOption = {
        title: {
          textStyle: {fontSize: titleFontSize}
        },
        series: [
          {
            type: 'pie',
            radius:[outerRadius, innerRadius],
            label: {
              fontSize: titleFontSize/2,
            }
          },
          {
            type: 'pie',
            radius:[outerRadius, innerRadius],
            label: {
              fontSize: titleFontSize/2,
            }
          },
          {
            type: 'pie',
            radius:[outerRadius, innerRadius],
            label: {
              fontSize: titleFontSize/2,
            }
          },
          {
            type: 'pie',
            radius:[outerRadius, innerRadius],
            label: {
              fontSize: titleFontSize/2,
            }
          },
          {
            type: 'pie',
            radius:[outerRadius, innerRadius],
            label: {
              fontSize: titleFontSize/2,
            }
          },
        ]
      }
      this.chartInstance.setOption(adapterOption)
      this.chartInstance.resize()
    },
    startInterval() {
      if (this.timeId) {
        clearInterval(this.timeId)
      }
      this.timeId = setInterval(() => {
        this.currentIndex++
        if (this.currentIndex > 1) {
          this.currentIndex = 0
        }
        this.updateChart()
      }, 5000)
    }
  }
}
</script>

<style scoped>

</style>